1212021001123 has 8 divisors (see below), whose sum is σ = 1212779453792. Its totient is φ = 1211262788736.

The previous prime is 1212021001111. The next prime is 1212021001129. The reversal of 1212021001123 is 3211001202121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212021001123 is a prime.

It is a super-2 number, since 2×1212021001123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212021001097 and 1212021001106.

It is not an unprimeable number, because it can be changed into a prime (1212021001129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10616461 + ... + 10730017.

It is an arithmetic number, because the mean of its divisors is an integer number (151597431724).

Almost surely, 2^{1212021001123} is an apocalyptic number.

1212021001123 is a deficient number, since it is larger than the sum of its proper divisors (758452669).

1212021001123 is a wasteful number, since it uses less digits than its factorization.

1212021001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120141.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1212021001123 its reverse (3211001202121), we get a palindrome (4423022203244).

The spelling of 1212021001123 in words is "one trillion, two hundred twelve billion, twenty-one million, one thousand, one hundred twenty-three".